mdc2dgst.c

/* crypto/mdc2/mdc2dgst.c *//* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) * All rights reserved. * * This package is an SSL implementation written * by Eric Young (eay@cryptsoft.com). * The implementation was written so as to conform with Netscapes SSL. * * This library is free for commercial and non-commercial use as long as * the following conditions are aheared to. The following conditions * apply to all code found in this distribution, be it the RC4, RSA, * lhash, DES, etc., code; not just the SSL code. The SSL documentation * included with this distribution is covered by the same copyright terms * except that the holder is Tim Hudson (tjh@cryptsoft.com). * * Copyright remains Eric Young's, and as such any Copyright notices in * the code are not to be removed. * If this package is used in a product, Eric Young should be given attribution * as the author of the parts of the library used. * This can be in the form of a textual message at program startup or * in documentation (online or textual) provided with the package. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * "This product includes cryptographic software written by * Eric Young (eay@cryptsoft.com)" * The word 'cryptographic' can be left out if the rouines from the library * being used are not cryptographic related :-). * 4. If you include any Windows specific code (or a derivative thereof) from * the apps directory (application code) you must include an acknowledgement: * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" * * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * The licence and distribution terms for any publically available version or * derivative of this code cannot be changed. i.e. this code cannot simply be * copied and put under another distribution licence * [including the GNU Public Licence.] */#include <stdio.h>#include <stdlib.h>#include <string.h>#include <openssl/des.h>#include <openssl/mdc2.h>#undef c2l#define c2l(c,l) (l =((DES_LONG)(*((c)++))) , \ l|=((DES_LONG)(*((c)++)))<< 8L, \ l|=((DES_LONG)(*((c)++)))<<16L, \ l|=((DES_LONG)(*((c)++)))<<24L)#undef l2c#define l2c(l,c) (*((c)++)=(unsigned char)(((l) )&0xff), \ *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \ *((c)++)=(unsigned char)(((l)>>16L)&0xff), \ *((c)++)=(unsigned char)(((l)>>24L)&0xff))staticvoid mdc2_body(MDC2_CTX *c, constunsignedchar *in, size_t len);
int MDC2_Init(MDC2_CTX *c)
{
c->num=0;
c->pad_type=1;
memset(&(c->h[0]),0x52,MDC2_BLOCK);
memset(&(c->hh[0]),0x25,MDC2_BLOCK);
return 1;
}
int MDC2_Update(MDC2_CTX *c, constunsignedchar *in, size_t len)
{
size_t i,j;
i=c->num;
if (i != 0)
{
if (i+len < MDC2_BLOCK)
{
/* partial block */
memcpy(&(c->data[i]),in,len);
c->num+=(int)len;
return 1;
}
else
{
/* filled one */
j=MDC2_BLOCK-i;
memcpy(&(c->data[i]),in,j);
len-=j;
in+=j;
c->num=0;
mdc2_body(c,&(c->data[0]),MDC2_BLOCK);
}
}
i=len&~((size_t)MDC2_BLOCK-1);
if (i > 0) mdc2_body(c,in,i);
j=len-i;
if (j > 0)
{
memcpy(&(c->data[0]),&(in[i]),j);
c->num=(int)j;
}
return 1;
}
staticvoid mdc2_body(MDC2_CTX *c, constunsignedchar *in, size_t len)
{
register DES_LONG tin0,tin1;
register DES_LONG ttin0,ttin1;
DES_LONG d[2],dd[2];
DES_key_schedule k;
unsignedchar *p;
size_t i;
for (i=0; i<len; i+=8)
{
c2l(in,tin0); d[0]=dd[0]=tin0;
c2l(in,tin1); d[1]=dd[1]=tin1;
c->h[0]=(c->h[0]&0x9f)|0x40;
c->hh[0]=(c->hh[0]&0x9f)|0x20;
DES_set_odd_parity(&c->h);
DES_set_key_unchecked(&c->h,&k);
DES_encrypt1(d,&k,1);
DES_set_odd_parity(&c->hh);
DES_set_key_unchecked(&c->hh,&k);
DES_encrypt1(dd,&k,1);
ttin0=tin0^dd[0];
ttin1=tin1^dd[1];
tin0^=d[0];
tin1^=d[1];
p=c->h;
l2c(tin0,p);
l2c(ttin1,p);
p=c->hh;
l2c(ttin0,p);
l2c(tin1,p);
}
}
int MDC2_Final(unsignedchar *md, MDC2_CTX *c)
{
unsignedint i;
int j;
i=c->num;
j=c->pad_type;
if ((i > 0) || (j == 2))
{
if (j == 2)
c->data[i++]=0x80;
memset(&(c->data[i]),0,MDC2_BLOCK-i);
mdc2_body(c,c->data,MDC2_BLOCK);
}
memcpy(md,(char *)c->h,MDC2_BLOCK);
memcpy(&(md[MDC2_BLOCK]),(char *)c->hh,MDC2_BLOCK);
return 1;
}
#undef TEST#ifdef TESTmain()
{
unsignedchar md[MDC2_DIGEST_LENGTH];
int i;
MDC2_CTX c;
staticchar *text="Now is the time for all ";
MDC2_Init(&c);
MDC2_Update(&c,text,strlen(text));
MDC2_Final(&(md[0]),&c);
for (i=0; i<MDC2_DIGEST_LENGTH; i++)
printf("%02X",md[i]);
printf("\n");
}
#endif